AWWA C115-20 pdf download.Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges
AWWA C115-20 or sections of this standard can be referenced in documents for purchasing and receiving flanged ductile-iron pipe. This standard can be used as a guide for casting, fabricating, and inspecting flanged ductile-iron pipe. The stipulations of this standard apply when this document has been referenced and only to flanged ductile-iron pipe with ductile-iron or gray-iron threaded flanges.
4.1.1 Materials. Materials shall comply with the requirements of the Safe Drinking Water Act and other federal regulations for potable water, wastewater, or reclaimed water systems as applicable.
4.1.2 Certification. Products intended for contact with potable water shall be certified to the requirements of NSF/ANSI/CAN 61. Certification shall be accomplished by a certification organization accredited by the American National Standards Institute (ANSI).
4.1.3 Permeation. The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping systems in locations where there is likelihood the piping system will be exposed to significant concentrations of pollutants composed of low-molecular-weight petroleum products or organic solvents or their vapors. Documented research has shown that piping system materials such as polyethylene and polyvinyl chloride and elastomers used in gaskets and packing glands are subject to permeation by low-molecular- weight organic solvents or petroleum products. If a potable water, wastewater, or reclaimed water piping system must pass through such a contaminated area or an area subject to contamination, consult the manufacturer regarding permeation of pipe walls, valve components, jointing material, and other piping system components before selecting materials for use in that area.
4.3.4 Bolt holes. Bolt holes shall be in accordance with the dimensions shown in Table 2 or 3. The bolt holes shall be equally spaced. If specified by the purchaser, flanges shall be drilled and tapped for studs. Stud bolts shall have the same dimensions as shown for regular bolts in Tables 2 and 3, except shorter lengths may be provided as shown.
4.4.1 Assembly. Both flange and pipe threads shall be clean before applying thread compound. The thread compound shall give adequate lubrication and sealing properties to provide pressure-tight joints. Threaded flanges shall be individually fitted and machine tightened on the threaded pipe at the point of fabrication.AWWA C115-20 pdf download.